Grinding machine



July 3,*1934. F. s HMS 1,965,235

GRINDING MACHINE Filed April 2,` 1931 2 Sheets-Sheet 1 July 3, 1934.

F.S.HAAS

GRINDING MACHINE Filed April 2, 1931 2 Sheets-Sheet.v 2

Y Citta/M449 Patented July 3, 1934 i I UNITED 'STATES PATENT OFFICE GmNDrNG MACHINE Frederick S. Haas, Cincinnati, Ohio, assignor to Cincinnati Grinders Incorporated, Cincinnati, Ohio, a corporation of Ohio Application April 2, 1931, Serial No. 527,252 'I Claims. (Cl. 51-166) This invention relates to improvements in masimilar reference characters are employed to dechine tool structures and especially to improvenote the same or similar parts. ments in a grinding machine. l A device of this invention may comprise a bedV One of the principal objects of the present inor base 10 having formed at the upperend therevention is the provision of improved means for of ways 11 and 12 for the work supporting table 6o driving laterally shiftable spindles or shafts, 13 translatable longitudinally of the bed 10 and such as a grinding wheel spindle. guided by the ways 11 and 12. The table 13 has Another object of the invention is the proviadjustably secured thereto headstock 14 and tailsion of an improved floating, flexible drive from a stock 15 for suitably supporting and rotating the prime mover or initial power source to a shiftwork 16. Any -known means may be employed 65 able spindle which will maintain the proper for translating Athe table 13. driving tension in the flexible drive means. The bed 10 is further provided with ways 17 Another object of the invention is the proviextending in a direction transversely to the ways sion of \a flexible or belt drive mechanism in 1l and 12, for the grinding wheel carriage 18 which the necessary tension is maintained and which rotatably supports a spindle 19 having se- 70 adjusted without the use of idler pulleys, gears, cured thereto the grinding wheel 20. The caror other tensioning mechanism. riage 18 and parts carried thereby are adapted Another object of the invention is the provito be actuated by means of a screw 21 rotated sion of improved means for supporting and drivby any known cross feed structure which tering a series of iiuid pumps, each having a funcminates in the cross feed ratchet 22. 75 tion independent of one another. In the past, idler gears, pulleys or the like, l A further object of the invention is the prohave been employed for maintaining the proper vision of an improved structure for assembling driving tension in a belt or other flexible drive, pr disassembling a plurality of individual units, utilized for rotating the spindle 19 and the grind- 25 each having its own power shaft and each shaft ing wheel 20. This has entailed a considerable 80 being driven from a common power source. expense and annoyance which has been elim- A still further object of the invention is the inated by the present invention. The spindle 19 provision of improved means for mounting a is driven from a suitable prime mover here shown plurality of units and providing a drive from the as an electric motor 23 carried by base or bed driving shaft of one unit to the driving shaft of 10 and having a motor shaft 24 to which is seg5 the next unit whereby certain units may be elimcured driving pinion 25. A silent chain 26 or inated or additional units employed and the couthe like, extends about the pinion 25, as well as pling between readily attained. about a pinion 27 fast on one end of a counter- Other objects and advantages of the present shaft 28. This countershaft 28 is suitably jourinvention should be readily apparent by refernaled in antifriction bearings 29 and 30 carried 90 ence to the following specification considered in in bearing Sleeve 31. At the other end the shaft -conjunction with the accompanying drawings 28 hes Secured t0 it a pulley here Shown as a and it is to be understood that any modifications nhlultlple belt Sheave 32- The belts 01 transmismay be made m the exact structural details there S1011 members 33 extend from the Sheave 32 up shown and described, Within the scope of the ap around pulley or sheave 34 secured on the outer 95 nded claims, without de artin from or exend of the spindle 19' geding the invention. p g The bearing sleeve 31 is mounted for swinging In the drawings: or osc1l1at1ng `movement toward and from the axis of the `spindle 19 for which purpose 1t has hmgure Il) l a tolhplain new of a'tgmdl ma" extending therefrom arms 35 and 36 each pro- 100 C 1n? em 0 Ymg e lmprovemen s o s m' vided with a bore in its free end and journaledy Ve111j10n on trunnions 37 and 38 extending from a bracket FlguIe 2 1S an eld elevatlonal VleW 0f the ma 39. The bracket 39 is formed integral with a ehmesheyvn 1n rugure 1 as seen from line 2-2 suitable plate 4o secured by bolts 41 extending on said Figure 1. through elongated slots 42 to the pad or bearing 105 Figure 3 iS a fragmentary Sectional View taken face 43 integral with the bed 10. The plate 40 on line 3 3 of Figure 2. substantially covers an opening into the interior Figure 4 iS a fragmentary sectional view taken of the bed 10 through whichthe bracket 39 and on line 4-4 of Figure 2. parts carried thereby are let. By reference to 55 Throughout the several views of the drawings Figure 2, it will be noted that the plate 40 is cut 11( permits the vertical swinging or oscillation of the bearing sleeve 31.

In order to maintain the proper distance between the axes of spindle 19 and shaft 28 there is provided an adjustable link connection. The

44 and 45, each having a threaded socket 46 and 47 receiving opposite ends of turn buckle screw 48. The plates 46 and 47 are respectively secured to the turned trunnion portion 49 on the grinding wheel carriage 18 and a trunnion 50 on the end of bearing sleeve 31.

By reference to Figure 2, it will be noted that movement of the carriage 18 on the ways 17 will tend to increase the distance between the axes of spindle 19 and shaft 28 but, due to the connection between these shafts, said movement of the carriage will oscillate the sleeve 31 about the axis of the trunnions of bracket 39 thereby at all times maintaining the same driving tension in the belts or transmission members 33. In order to properly tension the transmission chain 26 the plate 40 tent of the said belt 26 by loosening the clamp bolts 41 and shifting said plate at which time the bolts 41 are again tightened.

The bracket 39 is provided interiorly thereof with bearings 51 and 52 for a pump shaft 53 journaled therein. This shaft 53 may be termed the main pump shaft and it has secured to it a pinion 54 about which is trained a gear chain pump pistons 58. The pump pistons 58 are enclosed in a suitable casing 59 secured to the bracket 39. The said main pump is utilized for vdelivering liuid under high pressure for actuating various units of a machine tool organization, such as the wheel head or carriage, for example.

Secured to the trunnion 38 is the housing or casing 60 of a twin gear booster portion thereof of the bracket 39. The pump 60 is provided with a pump shaft 6l extending beyond the ends of said pump. One end 62 of the shaft 61 is journaled in a socket formed in the adjacent end of the main pump shaft 53 and the said end of the pump shaft 53 has a slot 63 formed therein receiving a pin 64 extending from opposite sides of the shaft 61. From this it will be seen that rotation of the shaft 53 will, through the slot and pin connection, drive the shaft 61. will be apparent that the axial shafts need not fine limits since It will be apparent that the shaft 67 is rotated from the shaft 61 and, similar to the alignment of shafts 53 and 6.1, the shaft 67 need not be in ab- Y solute axial alignment since proper driving connection may be had.

Secured to the trunnion 37 of the bracket 39 is another connection, a slight misalignment will` be amply compensated for.

It is to be understood that if desired, certain pumps may be eliminated when not needed without in anywise interfering with the general asbe effectively used for connecting the ends of the arms 35 and 36 and the trunnions 37 and 38.

To avoid possible injury to the ment transversely thereof, a spindle journaled in the carriage, means for rotating said spindle including a prime mover, a countershaft, flexible power transmission means between the prime mover and countershaft, flexible transmission The adjacent inner ends 81 of the,

shaft and spindle from one another to tension the flexible transmission means therebetween, and means for locking the plate in adjusted positions in the direction of extent of the flexible transmission means between the prime mover and countershaft to tension said transmission means.

2. In a machine of the class described the combination of a bedor support, a grinding wheel carriage carried thereby and movable transversely thereof, a spindle journaled in said carriage, means for actuating the carriage relative to the bed, a plate carried by the bed, a bracket supported by the plate, a trunnion projecting from one side of the plate, a trunnion projecting from the other side of the bracket, a bearing sleeve having arms extending therefrom and journaled for oscillating movement about the trunnions, a countershaft in said bearing sleeve, flexible transmission means between the countershaft and spindle, and means pivotally'mou'nted at opposite ends concentrically with the axis of the spindle and countershaft for definitely spacing the said, axes of the spindle and countershaft from one another to' tension the flexible transmission means during the transverse adjustment of the grinding wheel carriage.

3. In a machine of the class described the combination of a bed or support, a grinding wheel carriage carried thereby and movable transversely thereof, a spindle journaled in said carriage, means for actuating the carriage relative to the bed, a plate carried by the bed, a bracket supported by the plate, a trunnion projecting from one side of the plate, a trunnion projecting from the other side of the bracket, a bearing sleeve having arms extending therefrom and journaled for oscillating countershaft in said bearing sleeve, flexible transmission means between the countershaft and spindle, means definitely spacing the axes of the spindle and countershaft from one another to tension the flexible transmissionA means during the transverse adjustament of the grinding wheel carriage, a prime mover, flexible transmission means between the prime mover and countershaft, and means for adjusting and clamping the plate and bracket in the direction of extent of the transmission means between the prime mover and countershaft for tensioning said transmission means.

4. In a machine of the class described the combination 'ofy a bed 'or support, a grinding wheel carriage carried thereby and movable transversely thereof, a spindle journaled in said carriage, means for actuating the carriage relative to the bed, a plate carried by the bed, a bracket supported by the plate, a trunnion projecting from one side of the plate, a trunnion projecting from the other side of the bracket, a bearing sleeve having arms extending therefrom and journaled for oscillating movement about the trunnions, a countershaft in said bearing sleeve, flexible transmission means between the counter` shaft and spindle, and means pivotally mounted at opposite ends concentrically with the axis of the spindle and countershaft for definitely spacing the said axes of the spindle and countershaft from one another to tension the flexible transmission means during the transverse adjustment of the grinding wheel carriage, said to tension the flexible v.l'I'lSSOIl means between movement about the trunnions, a'

means including a turn buckle connection between the countershaft and grinding wheel carriage.

5. In a machine of the class described the combination of a bed or support, a grinding wheel carriage carried thereby and movable transversely thereof, a spindle journaled in said carriage, means for actuating the carriage relative to the bed, a plate carried by the bed, a bracket supported by the plate, a trunnion projecting from one side of the plate, a trunnion projecting from the other side of the bracket, a bearing sleeve having arms extending therefrom and journaled for oscillating movement about the trunnions, a countershaft in said bearing sleeve, flexible transmission means between the countershaft and spindle, means definitely spacing the axes of the spindle and countershaft from one another transmission means during the transverse adjustment of the grinding wheel carriage', a fluid pump mechanism including a pump shaft-carried by the bracket, and transthe countershaft and latter from the pump shaft for driving the former.

6. In a machine of the class described the combination of a bed or support, a grinding wheel carriage carried thereby and movable transversely thereof, a spindle journaled in said carriage, means for actuating the carriage relative to the bed, a plate carried by the bed, a bracket supported by the plate, a trunnion projecting from one side of the' plate, a trunnion projecting from the other side of the bracket, a bearing sleeve having arms extending therefrom and journaled for oscillating movement about the trunnions, a countershaft in said bearing sleeve, flexible transmission means between the countershaft and spindle, means definitely spacing the axes of the spindle and countershaft from one another to tension the flexible transmission means during the transverse adjustment of the-grinding wheel carriage, a fluid pump mechanism including a pump shaft carried by the bracket, transmission means between the' countershaft and pump shaft for driving the latter from the former, a second pump adapted to be secured to the bracket or plate including a rotatable shaft, and means for coupling the rotatable shaft with the pump shaft.

7. In a device of the class described the combination of a bed, a grinding wheel carriage carried thereby and shiftable relative thereto, a spindle journaled in the carriage, means for actuating the carriage transversely of the bed, a bearing sleeve, a countershaft journaled in said sleeve, means pivotally mounting the sleeve on the'bed, flexible transmission means between the countershaft and spindle, a trunnion formed on the carv .of the plates for denitely spacing the axes of the spindle and floating countershaft from one another to tension the flexible transmission means therebetween during the transverse adjustment of the grinding wheel carriage.

FREDERICK S. HAAS. 

